A dousche coosh is slightly similar to a cunt. Deragatory towards the female species. Its a biznatch that has a bulgy, cushiony pussy (that you may use as a pillow) but you might pass out because it smells like it needs to be dousched.

"I'm not goin anywhere near that dousche coosh"
"Whats that smell? Do you have a dousche coosh"
"Dude... did you just wake up from a dousche coosh?"
"Your dousche coosh looks like a kangaroo pouch"
"Your dousche coosh is so huge it looks like you gave birth to a horse"